No Reverse HELP

[Rabbi]

I just bought a 1993 mitsu eclipse 1.8 sohc automatic last friday
YAY! (even tho its not a turbo finally i found a dsm for cheap,$400 bucks)

I bought it and the guy said it had a bad transmission,I towwed it home,Then jump started it. And to my amaze all the gears except reverse work...Now ive been doing some reading,And ive heard that the dsm's have a sort of "pump" for reverse or somthing of the like. Could this be my problem? When i put it in reverse it makes sort of a low-pitch squeeling noise. Very hard to explain the noise it makes. Can anybody help me with this problem? Thanks

 

[chitalon]

by the "pump" i suppose you mean the center support right?
thats the thing with 2 o rings on the top.
before pulling the trans i reccomend that you pressure test the low reverse brake. the pressure should be 213 psi or more at idle
if you have 0 then possibilities are that the center suppot is not properly alligned or it is missing the o rings
if thats the case bring down the transmission and pop it open
(only if you know what your doin or have a great memory)

 

[transdude]

Originally posted by Rabbi
I just bought a 1993 mitsu eclipse 1.8 sohc automatic last friday
YAY! (even tho its not a turbo finally i found a dsm for cheap,$400 bucks)

I bought it and the guy said it had a bad transmission,I towwed it home,Then jump started it. And to my amaze all the gears except reverse work...Now ive been doing some reading,And ive heard that the dsm's have a sort of "pump" for reverse or somthing of the like. Could this be my problem? When i put it in reverse it makes sort of a low-pitch squeeling noise. Very hard to explain the noise it makes. Can anybody help me with this problem? Thanks

There is only one pump in modern day automatic transmissions, it is working any time that the engine is running.

If you have a no reverse condition, it is probably time for a rebuild or a replacement of the transmission.

-John